CN101478827B - Method, system and apparatus for retransmitting preamble signature - Google Patents
Method, system and apparatus for retransmitting preamble signature Download PDFInfo
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- CN101478827B CN101478827B CN2008100013256A CN200810001325A CN101478827B CN 101478827 B CN101478827 B CN 101478827B CN 2008100013256 A CN2008100013256 A CN 2008100013256A CN 200810001325 A CN200810001325 A CN 200810001325A CN 101478827 B CN101478827 B CN 101478827B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000013468 resource allocation Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000002708 enhancing effect Effects 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 abstract description 8
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 6
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/04—Scheduled access
- H04W74/06—Scheduled access using polling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
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Abstract
The embodiment of the invention discloses a method for transmitting a preamble signature once again, which comprises that: a retry capture instruction returned from a base station is received by a user facility UE, which is generated by the base station when allocation of strengthened dedicated transmission channel E-DCH resource corresponding with the preamble signature transmitted last time by the UE is finished; the preamble signature is transmitted once again by the UE according to the retry capture instruction. Through the embodiment of the invention, the retry capture instruction is returned to the UE by the base station, and the preamble signature is transmitted once again by the UE according to the retry capture instruction. When a strengthened RACH random access process is initiated by the UE, efficiency of E-DCH resource allocation is improved, thus obviously lowering blocking probability; meanwhile, time lapse of the strengthened RACH random access process can be lowered remarkably.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of mthods, systems and devices of retransmitting preamble signature.
Background technology
The physical accidental access procedure is triggered by the request of MAC (Medium Access Control, medium access control) layer.Before the physical accidental access procedure begins, physical layer need be from RRC (Radio ResourceControl, Radio Resource control) layer receives following parameter information: leading scrambler, message-length (10ms or 20ms), AICH (Acquisition Indicator Channel, AICH Acquisition Indication Channel) emission regularly, each ASC (Access Service Class, the access service grade) available signature collection and RACH (Random Access Channel, Random Access Channel) set of sub-channels, the power ramp step-length, leading maximum retransmission, leading initial power, power bias between the leading and random accessing message control section of emission at last and TFS Transport Format Set parameter or the like.Accordingly, the MAC layer can notify physical layer following parameter information: message part transformat, ASC and transport block set in the process that triggers the physical accidental access.
At 3GPP (3rd Generation Partnership Project, 3G (Third Generation) Moblie partner plan) WCDMA (Wideband Code Division Multiple Access, the Wideband Code Division Multiple Access (WCDMA) access) in the R8 version, for the UE under the non-proprietary attitude, in order to reduce the uplink time delay, to improve uplink speed, these new features of enhancing RACH have been introduced.Strengthening the RACH random access procedure uses E-DCH (Enhanced Dedicated Channel strengthens dedicated transmission channel) to replace RACH to realize uplink.The roughly flow process that strengthens RACH comprises leading (preamble) and resource allocation stage, conflict resolution stage, E-DCH data transfer phase and release stage.
All available up E-DCH resources are broadcasted by system message, wherein the corresponding resource index value of the up E-DCH resource of every suit.After the MAC layer has triggered enhancing RACH physical accidental access procedure, it is leading that physical layer need be selected up access slot, signature and one of leading transmitting power emission, if NodeB detects preamble signature and the pairing E-DCH resource of this preamble signature still has the free time, then NodeB returns a resource index value by the AICH channel and catches indication to UE as ACK.Next, UE can use the pairing up E-DCH resource of this resource index value to carry out follow-up data and send, as shown in Figure 1.If but all distributed to other UE with corresponding all E-DCH resources of preamble signature of last emission, then NodeB would return NACK by the AICH channel and catches indication.After UE receives that NACK catches indication, will withdraw from current enhancing RACH random access procedure.In order to send the outgoing data in the buffer memory, the MAC layer of UE all can only trigger new next time enhancing RACH random access procedure once more.
In realizing process of the present invention, the inventor finds: the relation of preamble signature and E-DCH resource index both can be " one to one " also can be " one-to-many ", can think the corresponding E-DCH resource pool of each preamble signature, but these resource pools are separate, as shown in Figure 2.If all the E-DCH resources in the resource pool of some preamble signature correspondences have all been distributed to other UE, even idle E-DCH resource is still arranged in the resource pool of other preamble signature correspondences, also have no idea in this enhancing RACH random access procedure, to distribute to UE.Therefore, when a UE initiates to strengthen the RACH random access procedure, there is higher blocking probability.
Summary of the invention
The embodiment of the invention provides a kind of mthods, systems and devices of retransmitting preamble signature, to realize improving the E-DCH efficiency of resource distribution, reduces blocking probability.
For achieving the above object, the embodiment of the invention provides a kind of method of retransmitting preamble signature on the one hand, comprise: user equipment (UE) receives the retry that returns the base station and catches indication, and described retry is caught indication and generated when once the enhancing exclusive use transmission signal channel resource allocation of the preamble signature correspondence of emission finishes before UE by described base station; Described UE catches the indication retransmitting preamble signature according to described retry.
On the other hand, the embodiment of the invention also provides a kind of system of retransmitting preamble signature, comprise: the base station, be used to return retry and catch indication, described retry is caught indication and is generated when once the E-DCH resource allocation of the preamble signature correspondence of emission finishes before UE by described base station; User equipment (UE) is used to receive the retry that returns described base station and catches indication, and catches the indication retransmitting preamble signature according to described retry.
On the one hand, the embodiment of the invention also provides a kind of base station, comprising again: the indication generation module is used for generating retry when once the E-DCH resource allocation of the preamble signature correspondence of emission finishes before UE and catches indication; Module is returned in indication, is used for that the retry that described indication generation module generates is caught indication and returns to UE.
Again on the one hand, the embodiment of the invention also provides a kind of user equipment (UE), comprise: the indication receiver module, be used to receive the retry that returns the base station and catch indication, described retry is caught indication and is generated when once the E-DCH resource allocation of the preamble signature correspondence of emission finishes before described UE by described base station; Leading transmitter module is used for catching the indication retransmitting preamble signature according to the retry that described indication receiver module receives.
Compared with prior art, the embodiment of the invention has the following advantages: by the embodiment of the invention, UE catches indication according to the retry that the base station is returned, retransmitting preamble signature.When UE initiates to strengthen the RACH random access procedure, improved the E-DCH efficiency of resource distribution, reduced blocking probability.
Description of drawings
Fig. 1 strengthens the schematic diagram of RACH physical accidental access procedure for prior art;
Fig. 2 is the prior art schematic diagram of E-DCH resource pool independently separately;
Fig. 3 is the flow chart of the method for embodiment of the invention retransmitting preamble signature;
Fig. 4 has reduced the schematic diagram of the enhancing RACH physical accidental access procedure of blocking probability for the embodiment of the invention;
Fig. 5 is the embodiment of the invention schematic diagram of E-DCH resource pool independently no longer separately;
Fig. 6 is the structure chart of the system of embodiment of the invention retransmitting preamble signature.
Embodiment
The embodiment of the invention provides a kind of method of retransmitting preamble signature, and by the embodiment of the invention, the base station is returned retry to UE and caught indication, and UE catches the indication preamble signature according to this retry.The UE of the embodiment of the invention can catch the indication retransmitting preamble signature according to retry, thereby initiate to strengthen the RACH random access procedure, improved the E-DCH efficiency of resource distribution, significantly reduced blocking probability, simultaneously, the time delay that strengthens the RACH random access procedure also can be reduced significantly.The base station of mentioning in the embodiment of the invention can be entities such as NodeB.
As shown in Figure 3, the flow chart for the method for embodiment of the invention retransmitting preamble signature may further comprise the steps:
Step S301, UE receives the retry that returns the base station and catches indication.In embodiments of the present invention, if corresponding all the E-DCH resources of preamble signature of once launching before the UE have all been distributed to other UE, but still have the free time with the corresponding E-DCH resource of other preamble signature, then the base station generates retry (RETRY) and catches indication, and this retry is caught indication returns to UE.This retry is caught the resource index value representation that indication can be returned by the AICH channel by the base station, and this resource index value is used for representing neither NACK to catch indication but retry is caught indication neither ACK catches indication that the base station is returned.
Preferably, once corresponding all E-DCH resources of preamble signature of emission have all been distributed to other UE before this UE, and when all E-DCH resources of all preamble signature or most of preamble signature correspondences had all been distributed to other UE, the base station was returned NACK and is caught indication.
Step S302, UE catches the indication retransmitting preamble signature according to retry.After UE receives that retry that the base station is returned is caught indication, can't withdraw from current enhancing RACH random access procedure, but catch the indication retransmitting preamble signature according to this retry.
For example, UE specifically can carry out following steps, as shown in Figure 4,
With the selected corresponding descending access slot of up access slot in, catch indication if UE detects with the selected corresponding retry of preamble signature, then UE
A) in the available RACH sets of sub-channels that strengthens RACH, select next available access slot;
B) in the available signatures set that strengthens RACH, select a preamble signature that is used for launching once more at random;
C) the leading transmitting power of instruction no longer continues to rise;
D) value with the preamble retransmission counter subtracts 1;
E) when the value of leading retransmission counter greater than 0, when promptly the preamble retransmission number of times did not reach maximum retransmission as yet, then UE launched the preamble signature of a selection once more based on the leading transmitting power of preamble signature last time.When the value of leading retransmission counter less than 0, when promptly the preamble retransmission number of times had reached maximum retransmission, UE need report the state information of receiving NACK on the AICH to MAC, and withdrawed from current physical accidental access procedure.
By the method for above-mentioned retransmitting preamble signature, no longer be separate between the E-DCH resource pool of each preamble signature correspondence, but set up contact, as shown in Figure 5.If all the E-DCH resources in the resource pool of a preamble signature correspondence have all been distributed to other UE, and idle E-DCH resource is still arranged in the resource pool of other preamble signature correspondences, strengthening at this so still to have the E-DCH resource allocation to give UE in the RACH random access procedure.Therefore, when UE initiates to strengthen the RACH random access procedure, can improve the E-DCH efficiency of resource distribution, reduce blocking probability.Simultaneously, also can significantly reduce the time delay that strengthens the RACH random access procedure.
As shown in Figure 6, structure chart for the system of embodiment of the invention retransmitting preamble signature, comprise: base station 1, be used to return retry and catch indication, this retry catch indication by base station 1 before UE2 once the E-DCH resource allocation of preamble signature correspondence of emission finish, but generate when still having the free time, specifically the resource index value representation that can return by AICH by base station 1 with the corresponding E-DCH resource of other preamble signature;
User equipment (UE) 2 is used to receive the retry that returns base station 1 and catches indication, and catches the indication preamble signature according to retry.
Wherein, base station 1 comprises: indication generation module 11 is used for generating retry when once the E-DCH resource allocation of the preamble signature correspondence of emission finishes before UE2 and catches indication;
Wherein, UE2 comprises: indication receiver module 21 is used to receive the retry that returns base station 1 and catches indication; Leading transmitter module 22 is used for catching the indication retransmitting preamble signature according to the retry that indication receiver module 21 receives.
Wherein, UE2 also comprises: time slot is selected module 23, is used for receiving after retry catches indication at indication receiver module 21, selects access slot in the RACH sets of sub-channels that strengthens RACH;
Leading selection module 24 is used for selecting a preamble signature that is used for launching once more at random in the signature set that strengthens RACH, and this preamble signature being offered leading transmitter module 22 after time slot is selected module 23 selection access slots;
Counter is provided with module 25, is used for after leading selection module 24 is selected preamble signature, and the value of preamble retransmission counter is subtracted 1, when the value of leading retransmission counter greater than 0 the time, notify the leading transmitter module 22 emissions preamble signature that leading selection module 24 is selected.
Wherein, UE2 also comprises: state reporting module 26, be used for when leading number of retransmissions has reached maximum retransmission, and report to MAC and receive the NACK state information on the AICH, and withdraw from current physical accidental access procedure.
The system of above-mentioned retransmitting preamble signature, base station 1 is returned retry to UE2 and is caught indication, and UE2 catches the indication retransmitting preamble signature according to this retry.When UE2 initiates to strengthen the RACH random access procedure, improved the E-DCH efficiency of resource distribution, significantly reduced blocking probability, simultaneously, the time delay that strengthens the RACH random access procedure also can be reduced significantly.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (11)
1. the method for a retransmitting preamble signature is characterized in that, comprising:
User equipment (UE) receives the retry that returns the base station and catches indication, and described retry is caught indication and generated when once the enhancing exclusive use transmission signal channel resource allocation of the preamble signature correspondence of emission finishes before described UE by described base station;
Described UE catches the indication retransmitting preamble signature according to described retry.
2. the method for retransmitting preamble signature according to claim 1, it is characterized in that, described retry catch indication further by described base station before described UE once the E-DCH resource allocation of preamble signature correspondence of emission finish and the E-DCH resource of other preamble signature correspondences generates when still having the free time.
3. the method for retransmitting preamble signature according to claim 1 is characterized in that described retry is caught the resource index value representation that indication is returned by AICH Acquisition Indication Channel AICH by described base station.
4. the method for retransmitting preamble signature according to claim 1, it is characterized in that, described UE catches the indication retransmitting preamble signature according to described retry and specifically comprises: after the retry that returns in described UE reception base station is caught indication, described UE selects access slot in the RACH sets of sub-channels that strengthens Random Access Channel RACH, in the signature set that strengthens RACH, select a preamble signature that is used for launching once more at random, and the value of preamble retransmission counter is subtracted 1, when leading number of retransmissions did not reach maximum retransmission as yet, described UE caught the preamble signature that selection is launched in indication once more according to described retry.
5. as the method for retransmitting preamble signature as described in the claim 4, it is characterized in that described preamble retransmission number of times does not reach maximum retransmission as yet and comprises: the value of preamble retransmission counter is greater than 0,
And/or described UE catches the indication retransmitting preamble signature according to described retry and comprises: described UE according to last time the leading transmitting power during preamble signature launch the preamble signature of described selection once more.
6. the system of a retransmitting preamble signature is characterized in that, comprising:
The base station is used to return retry and catches indication, and described retry is caught indication and generated when once the E-DCH resource allocation of the preamble signature correspondence of emission finishes before user equipment (UE) by described base station;
User equipment (UE) is used to receive the retry that returns described base station and catches indication, and catches the indication retransmitting preamble signature according to described retry.
7. as the system of retransmitting preamble signature as described in the claim 6, it is characterized in that described base station comprises:
The indication generation module is used for generating retry when once the E-DCH resource allocation of the preamble signature correspondence of emission finishes before described UE and catches indication;
Module is returned in indication, is used for that the retry that described indication generation module generates is caught indication and returns to UE.
8. as the system of retransmitting preamble signature as described in the claim 6, it is characterized in that described UE comprises:
The indication receiver module is used to receive the retry that returns described base station and catches indication;
Leading transmitter module is used for catching the indication retransmitting preamble signature according to the retry that described indication receiver module receives.
9. a base station is characterized in that, comprising:
The indication generation module is used for generating retry when once the E-DCH resource allocation of the preamble signature correspondence of emission finishes before user equipment (UE) and catches indication;
Module is returned in indication, is used for that the retry that described indication generation module generates is caught indication and returns to UE.
10. a user equipment (UE) is characterized in that, comprising:
The indication receiver module is used to receive the retry that returns the base station and catches indication, and described retry is caught indication and generated when once the E-DCH resource allocation of the preamble signature correspondence of emission finishes before described UE by described base station;
Leading transmitter module is used for catching the indication retransmitting preamble signature according to the retry that described indication receiver module receives.
11. as UE as described in the claim 10, it is characterized in that, also comprise:
Time slot is selected module, is used for receiving after retry catches indication at described indication receiver module, selects access slot in the RACH sets of sub-channels that strengthens RACH;
Leading selection module is used for selecting a preamble signature that is used for launching once more at random in the signature set that strengthens RACH, and described preamble signature being offered described leading transmitter module after described time slot is selected module selection access slot;
Counter is provided with module, be used for after described leading selection module is selected preamble signature, the value of preamble retransmission counter is subtracted 1, when the value of described preamble retransmission counter greater than 0 the time, notify described leading transmitter module to launch the preamble signature that described leading selection module is selected.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100013256A CN101478827B (en) | 2008-01-04 | 2008-01-04 | Method, system and apparatus for retransmitting preamble signature |
| PCT/CN2008/073816 WO2009092267A1 (en) | 2008-01-04 | 2008-12-29 | Method, system and apparatus for transmitting a preamble signature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100013256A CN101478827B (en) | 2008-01-04 | 2008-01-04 | Method, system and apparatus for retransmitting preamble signature |
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| Publication Number | Publication Date |
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| CN101478827A CN101478827A (en) | 2009-07-08 |
| CN101478827B true CN101478827B (en) | 2011-09-14 |
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| CN2008100013256A Expired - Fee Related CN101478827B (en) | 2008-01-04 | 2008-01-04 | Method, system and apparatus for retransmitting preamble signature |
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| WO (1) | WO2009092267A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105120522A (en) * | 2009-07-30 | 2015-12-02 | 华为技术有限公司 | Random access method and device |
| US9014121B2 (en) * | 2010-07-21 | 2015-04-21 | Nokia Corporation | Apparatus and method for acquisition of a common enhanced dedicated channel resource |
| CN103797882A (en) * | 2011-07-14 | 2014-05-14 | 交互数字专利控股公司 | Method and apparatus for ranging power control for machine-to-machine communications |
| CN103582153A (en) * | 2012-08-03 | 2014-02-12 | 华为技术有限公司 | Random access method and user equipment |
| CN104838717B (en) * | 2013-06-06 | 2018-09-28 | 华为技术有限公司 | A kind of method and apparatus of random access |
| EP2869657A1 (en) * | 2013-10-30 | 2015-05-06 | Alcatel Lucent | Allocation of Communication Resources for Device to Device Wireless Communication |
| CN108513309B (en) * | 2018-06-21 | 2021-10-01 | 重庆邮电大学 | Access congestion control method of NB-IoT system |
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| CN1549475A (en) * | 2003-05-12 | 2004-11-24 | 北京三星通信技术研究有限公司 | Fast random switching in method used for upward special channel enhancement of WCDMA system |
| CN1649440A (en) * | 2004-01-26 | 2005-08-03 | 埃沃柳姆公司 | Dynamic adaptation of detection of requests to access a cellular communications network |
| CN101098186A (en) * | 2006-06-27 | 2008-01-02 | 中兴通讯股份有限公司 | Method for accessing randomly front detection dynamic threshold |
| CN101098297A (en) * | 2006-06-30 | 2008-01-02 | 大唐移动通信设备有限公司 | Random access method and pilot code extending method |
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2008
- 2008-01-04 CN CN2008100013256A patent/CN101478827B/en not_active Expired - Fee Related
- 2008-12-29 WO PCT/CN2008/073816 patent/WO2009092267A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1549475A (en) * | 2003-05-12 | 2004-11-24 | 北京三星通信技术研究有限公司 | Fast random switching in method used for upward special channel enhancement of WCDMA system |
| CN1649440A (en) * | 2004-01-26 | 2005-08-03 | 埃沃柳姆公司 | Dynamic adaptation of detection of requests to access a cellular communications network |
| CN101098186A (en) * | 2006-06-27 | 2008-01-02 | 中兴通讯股份有限公司 | Method for accessing randomly front detection dynamic threshold |
| CN101098297A (en) * | 2006-06-30 | 2008-01-02 | 大唐移动通信设备有限公司 | Random access method and pilot code extending method |
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| CN101478827A (en) | 2009-07-08 |
| WO2009092267A1 (en) | 2009-07-30 |
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